For you all that commute with clipless and have tried a few, what are the easiest to unclip from?

Right now I have spd-sl and its decent to unclip, but would like it to be easier. I have to be in a certain position. The main reason I am looking for new pedals because walking in spd-sl shoes are horrible.

I actually bought the pedals 1st based on the fact they looked good for riding without bike shoes, without knowing what the cleat would look like on my shoe. But they are actually great without shoes. Ride all the time in my tennis shoes.

The 2 pedals I am looking at now are the shimano pd-m540. And the crank brother candy or acid.

Basically it's down to spd vs crank brother. They both look decent enough to short rides without shoes. Clipping in looks easy enough. Clipping in is not super critical for me, but clipping out is. Need to be able to clip out in a split second. With the spd-sl I can't. My leg has to be near the 6 o clock position. Not sure if that is because of the pedal style, or just me.

Any input on clipping out with spd vs crank brothers would be great. If I had to pick right now would get the shimano's. They look much better to ride without shoes. But if the crank brothers are superior for clipping out, then I will try those.

Thanks.